Adjustable center punching jig for 3 hole hinges



P. C. SIMON June 9, 1959 ADJUSTABLE CENTER PUNCHING JIG FOR 3 HOLE HINGES Filed Sept. l0, 195'? INVENTOR.

VIII/14mm A ATTCI R N EYS ADJUSTABLE CENTER PUNCHING JIG FOR 3 HGLE HINGES Peter C. Simon, Waukesha, Wis. Application September 10, 1957, Serial No. 683,087 2 Claims. (Cl. 33-189) vThis invention relates to a marking tool or gauge, and more particularly to a tool for use in marking holes through which securing elements such as screws are adapted to be driven, as for example when hinges are being secured in place.

The object of the invention is to provide a jig which is adapted to be used tor marking holes whereby hinges can be accurately positioned and readily secured in place.

Another object of the invention is to provide an adjustable center punching jig for use with hinges such as semiconcealed cabinet hinges, and wherein the jig of the presen-t invention includes a member that is adapted to be positioned over a hinge which is mounted in a recess of a cabinet or other structure, and wherein the jig can be readily adjusted so that punches can be aligned with holes in the hinge, so that these punches can be actuated to thereby make marks in the supporting structure, so that holes can later be accurately drilled through the punched marks in order to subsequently secure the hinge in place.

A further object of the invention is to provide an adjustable jig which is extremely simple and inexpensive to manufacture.

Other objects and advantages will be apparent during the course of the following description.

In the accompanying drawings, forming a part Vof this application, and in which like numerals are used to designate like parts throughout the same:

Figure l is a plan view showing the adjustable jig of the present invention.

Figure 2 is an elevational view of the adjustable jig, looking at right angles to the view shown in Figure 1.

Figure 3 is a sectional view taken on the line 3-3 of Figure 1.

Figure 4 is a perspective view showing how the jig of the present invention is used.

Referring in detail to the drawings, the numeral indicates the jig of the present invention, and the jig 10 includes a base 11 of rectangular formation, and depending from one edge of the base 11 and secured thereto or formed integral therewith is a right angularly arranged ange 12, Figure 3.

Adjustably mounted adjacent the upper surface of the base 11 is a plurality of bars 13. Each of the bars 13 has the same construction, and each bar 13 is provided with a slot 14. Suitable securing elements such as the bolts extend through the base 11, and through the slots 14 in the bars 13, and a nut 16 is connected to each bolt 15. The heads of the bolts 15 are snugly seated in countersunk openings in the base 11.

There is further provided in each of the bars 13 an aperture 17 which registers with a cut-out 18 in the base 11. Extending upwardly from an end portion of each of the bars 13 and secured thereto or formed integral therewith is an externally threaded sleeve 19 which has a hollow interior. The numeral 20 indicates a body member, and one of the body members 20 threadedly engages each of the sleeves 19. The body members 20 are hollow, and each body member 20 includes an outer continuous tes Patent wall member 21 which is knurled externally so as to facilitate manual handling thereof. Each body member 20 further includes a top Wall 22 which is provided with an opening 23 therein, and a stem or shank 24 is slidably 28 being interposed between the head 25 and the top oiV the sleeve 19. As shown in Figure 3 -for example, the lower end of each pin 27 is pointed as at 29 so that when the upper end of the stern 24 is struck with a hammer or the like, the pointed end 29 will pass down through the aperture 17 and through the cut-out 18 so that a mark can be made by the pointed end 29 whereby this mark can later be used as a center hole which can be drilled for the reception of bolts, screws or the like.

Referring to Figure 4 of the drawings, the numeral 30 indicates a portion of a conventional hinge which is provided with the usual holes 31 therein, and the hinge 30 is adapted to be seated in a cut-out or recess 32 in a supporting structure such as the cabinet 33. By means of the present invention, the hinge 30 is adapted to be positioned in its recess 32, and then the jig 10 is arranged in engagement therewith, andthe bars 13 can be adjusted so that the punchers or pins 27 are aligned with the openings 31 in the hinge 30. Then, by tapping on or striking the stems 24, the pins 27 will be moved downwardly through the registering openings in the hinge so that the pointed end 29 will make marks in the cabinet structure 33, whereby these marks can later be used as guides for drilling the screw holes. Thus, it will be seen that the jig provides a means whereby screw holes for concealed hinges can be accurately and readily formed.

From the foregoing, it is apparent that there has been provided a jig which is especially suitable for use in punching holes such as holes for use with the three-hole type of semi-concealed cabinet hinge. In use, when holes are to be drilled to coincide with the hinge openings such as the hinge openings 31 of Figure 4, the recess 32 is first formed in the cabinet 33 or other structure. Then, the hinge 30 has a portion thereof seated in the recess 32 as shown in Figure 4. Next, the device 10 is positioned on top of the hinge 30 as shown by broken lines in Figure 4, and it is to be noted that the base 11 snugly ts over the portion of the hinge Sil, while the ilange 12 acts as a stop member or guide to maintain the jig 10 in its proper position. Then, the nuts 16 are loosened and this permits the bars 13 to be shifted or adjusted on the base 11, and the bars 13 are shifted until the punches 27 coincide with or register with the openings 31 in the hinge 3th Then, the nuts 16 are tightened whereby the bars 13 are maintained immobile in their adjusted position. In view of the fact that the hinge 36 includes three openings 31 in each plate portion thereof, it is to be noted that there is provided three punches 27 whereby three marking holes can be conveniently made in the cabinet structure 33. With the punch 27 centered over the opening 31 in the hinge 3G, and with the nut 16 tightened on the bolt 15, it will be seen that the upper projecting stem 24 can be readily tapped or struck with a hammer or the like, so that this will cause the head 25 to move downwardly in the body member 20 and this will move the punch 27 downwardly so that the lower pointed end 23 willpass through the aperture 17 and through the cut-out 18 in the base 11, and then through the opening 31 therebelow whereby a mark can be made in the cabinet 33. Since there are three openings 31 in each plate portion of the hinge 30, it is to be noted that there are three of the body members 20 which all have the same construction, and

this arrangement permits the three holes to be marked or tapped while the jig is in place. After the punch marks have been made by means of the pointed ends 29, the jig 10' isremoved, and then the punch marks can be used as centering guides so that a drill can be used to form screw holes 'or the like as for example when` screws are to be later used for anchoring the hinge to the structure 33. As previously described, a coil spring 28 is provided for each plunger 27, and the coil spring 28 serves to raise the punch or pin 27 to the upper position after the punch has been moved downwardly by the hammer striking the stem 24, so that the coil spring 28 will normally urge the punch 27 from the broken line position shown in Figure 3 to the solid line position of Figure 3.

The parts can be made of any suitable material and in different shapes or sizes. The stem 24 and head 25 may be made of hardened s-teel, while the vpunch 2.7 may be made of mild steel. The knurled wall member 21 facilitates the manual handling or gripping of these members. The slots such as the slot 14 and the cut-outs 18 provide a means whereby the bars i3 can be readily adjusted on the base l1 so as to properly center the punches 27 with the openings in the hinge plate. In view of the fact that there are three of the punches, it is to be noted that three holes can be punched at one setting of the device. Thus, since the spacing of the three holes in the hinge plates diers on various makes of hinges, the adjustable feature Vof the present invention is highly advantageous, and the jig will permit holes to be punched quickly and accurately and easily.

It will be understood of course that the invention contemplates such other embodiments or modiiications as may occur to those skilled in the art.

What is claimed as new is as follows:

l. In a jig, a base, a ange arranged at right angles with respect to an edge of said base and depending therefrom, a plurality of bars adjustably mounted on said base, each of said bars being provided with a slot, securing elements extending through said base and through the slots in said bars, each of said bars being provided with an aperture, there being cut-outs in said base registering with said apertures, an externally threaded sleeve extending upwardly from each of said bars and said sleeves being hollow, a body member having a threaded interior threadedly engaging said sleeve, said body member including an outer side wall and a top wall provided with an opening therein, a stem extending upwardly through the opening in said top wall, a head on the lower end of said stem and said head having a recess therein, a punch having its upper end secured within said recess, the lower end of said punch being pointed and adapted to project through said registering aperture and cut-out, and a coil spring circumposed on said punch and interposed between said head and the upper end of said sleeve.

2. In a jig, a base, a flange arranged at right angles with respect to an edge of said base and depending therefrom, a plurality of bars adjustably mounted on said base to provide a substantially T-formation, each of said bars being provided with a slot, securing elements extending through said base and through the slots in said bars, each of said bars being provided with an aperture, there being cut-outs in said base registering with said apertures, an externally threaded sleeve extending upwardly from each of said bars in substantially triangular relation to each other and said sleeves being hollow, a body member having a threaded interior threadedly engaging said sleeve, said body member including an outer side Wall and a top wall provided with an opening therein, a stem extending upwardly through the opening in said top wall, a head on the lower end of said stem and said head having a recess therein, a punch having its upper end secured within said recess, the lower end of said punch being pointed and adapted to project through said registering aperture and cut-out, a coil spring circumposed on said punch and interposed between said head and the upper end of said sleeve, the outer surface of said body member being knurled, whereby with a hinge seated in the cut-out, the pointed ends of the punches can be moved through the holes in the hinge that are positioned in substantially triangular relation to each other to make punched marking holes.

References Cited in the le of this patent UNITED STATES PATENTS 893,562 Ash Iuly 14, 1908 1,235,031 Holmgren July 3l, 1917 1,424,941 Pirwitz Aug. 8, 1922 2,649,157 Weisbeck Aug. 18, 1953 2,807,095 Maxwell Sept. 24, 1957 

